Was it that he couldn't release, even though he wanted to and was trying? (that's how I read it)
If so, I'd suggest not even worrying about or trying for climax. Just have fun for XX amount of minutes, (yes, agree on a time) and then it's clothes back on, do something else time. Rest, repeat later or the next day.
Of course he should drop all MB.
After several sessions like this, I think things will start to pop naturally.
And yes, good job!
M: A really long time. Crisis: 5 years. She's still worth it.
Life is never made unbearable by circumstances, but only by lack of meaning and purpose. -Viktor Frankl